Quick view Add to Cart Modification of Oil Tank Hopper Assembly Document Part Number: Service Bulletin No. 21, T.O. No. 01-40NC-86 Number of pages: 4Part Number: Service Bulletin No. 21, T.O. No. 01-40NC-86Revision Date: 12-Mar-1946Description: C-47B MSRP: Was: Now: $15.00